In brief:
Need to examine

Your iron treatment and mouth ulcers + glands in the neck are probably not related.

Your symptoms warrant an in-person evaluation with additional history, physical examination and may be some tests. It would be prudent to consult a doctor.
Wish you good health!

In brief:
Need to examine

Your iron treatment and mouth ulcers + glands in the neck are probably not related.

Your symptoms warrant an in-person evaluation with additional history, physical examination and may be some tests. It would be prudent to consult a doctor.
Wish you good health!
Would you like to video or text chat with me?